we had to to know something had to be wrong with the man in connecticut. the chief medical examiner is still trying to figure out exactly what it was. the doctor tells the hartford newspaper that he is trying to determine whether a genetic disease might have played a part in adam lanza's shooting spree. friends of alan zaps family say they were told he had aspergers syndrome a disorder on the autism spectrum. aspergers is not linked to any violent behavior. aspergers is simply not on the menu in terms it of what is wrong with this kid. rick leventhal on the top story at the bottom of the hour. live tonight in newtown. it sounds like this investigation is really taking a bit of an unusual turn, rick. >> yes, shepard. a genetic turn. obviously a key question for investigators is what was wrong with adam lanza? is there some clue in his d.n.a. to explain his murderous rampage? that's why the state medical examiner has asked a jennette cyst geneticists examine the results searching for some possible clue in adam lanza's remains. a possible motive under conside